Book Image

Animating SwiftUI Applications

By : Stephen DeStefano
Book Image

Animating SwiftUI Applications

By: Stephen DeStefano

Overview of this book

Swift and SwiftUI are the backbone of Apple application development, making them a crucial skill set to learn. Animating SwiftUI Applications focuses on the creation of stunning animations, making you proficient in this declarative language and employing a minimal code approach. In this book, you'll start by exploring the fundamentals of SwiftUI and animation, before jumping into various projects that will cement these skills in practice. You will explore some simple projects, like animating circles, creating color spectrums with hueRotation, animating individual parts of an image, as well as combining multiple views together to produce dynamic creations. The book will then transition into more advanced animation projects that employ the GeometryReader, which helps align your animations across different devices, as well as creating word and color games. Finally, you will learn how to integrate the SpriteKit framework into our SwiftUI code to create scenes with wind, fire, rain, and or snow scene, along with adding physics, gravity, collisions, and particle emitters to your animations. By the end of this book, you’ll have created a number of different animation projects, and will have gained a deep understanding of SwiftUI that can be used for your own creations.
Table of Contents (18 chapters)

Adding haptics and button sounds

Haptics are a form of sensory feedback that works by accessing the internal vibration hardware on an iPhone, providing a physical response when the phone is being used. You are probably familiar with haptics, as it’s felt every time we set our phones to vibrate. We won’t use a full vibration but just a brief one that the user can feel every time they click on a button.

The best place to add such code is in the button itself, so let’s do that. We’re going to use the UIImpactFeedbackGenerator class for this, and it is actually quite simple to implement. First, inside ContentView, we need an instance of that class underneath all the properties that we already added:

//haptic feedback
var hapticImpact = UIImpactFeedbackGenerator(style: 
  .medium)

We have set the hapticImpact variable style to medium, but you can set the vibration to heavy, light, ridged, or soft.

Now, to use this, we just simply call this...